Dryflex FLAM. Halogen-Free Flame Retardant TPEs

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1 Dryflex FLAM Halogen-Free Flame Retardant TPEs

2 CONTENTS BRAND NAMES & NOMENCLATURE INTRODUCTION KEY PROPERTIES FLAM 600 SERIES FLAM 700 SERIES TYPICAL APPLICATIONS EXPLANATION OF FLAMMABILITY TESTS PROCESSING CONTACTS

3 BRAND NAMES In 2017 we restructured our TPE product brands to create a more cohesive portfolio. For new developments and projects we consolidated the Dryflex and Lifoflex grades under the Dryflex name. For our flame retardant grades, this means that new developments and newly customised grades are called Dryflex FLAM, however a number of our existing formulations have UL, automotive, railroad and other certifications and listings, these grades are sold under the Lifoflex FLAM reference. In this eguide we give an overview of the typical properties of our flame retardant grades, however, this does not list all available properties and materials. Please use this guide as an introduction and contact us to discuss your specific requirements.

4 INTRODUCTION Drylex FLAM are a range of halogen-free flame retardant thermoplastic elastomers (TPEs) designed to meet the most demanding applications where resistance to ignition and burning are important features. The FLAM compounds contain additives to give them better resistance to burning compared to general TPE grades. The range includes halogen and antimony free grades which are low smoke and compliant with the Restriction of Hazardous Substances (RoHS) directives, offering flame retardancy without the use of polybrominated diphenyl ether (PBDE).

5 KEY PROPERTIES Halogen and antimony free grades 40 to 90 Shore A hardnesses High flexibility Conforms to European directives 2011/65/EU (RoHS) and 2003/11/EC Low smoke Good adhesion to thermoplastics including PP, PE, ABS and PC Good mechanical properties Available in combination with antistatic or electrical conductivity Temperature range from -40 C to 100 C

6 FLAM : 600 SERIES Flame retardant TPE, halogen free, fulfils the specification of UL 94 V0 with 3mm wall thickness. Easy processing by injection moulding and extrusion. Grade Hardness 1 DIN (A) Shore A Density ISO (A) g/cm3 Tensile Strength 2 DIN MPa Elongation at Break 2 DIN % CS 23 C / 72h ISO Type B % CS 70 C / 22h ISO Type B % Flame Retardant Rating 3 UL 94 3mm Glow Wire Test IEC mm at 650 C Glow Wire Test IEC mm at 850 C UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass 1 3 seconds 2 Across the flow direction 3 Internal tests show materials to be compliant with UL requirements. Materials are not UL listed 4 UV FLAM is UL approved. File number E249957

7 FLAM : 700 SERIES Flame retardant TPE, halogen free, fulfils the specification of UL 94 V0 with 1.5mm wall thickness. Easy processing by injection moulding and extrusion. Grade Hardness 1 DIN (A) Shore A Density ISO (A) g/cm3 Tensile Strength 2 DIN MPa Elongation at Break 2 DIN % CS 23 C / 72h ISO Type B % CS 70 C / 22h ISO Type B % Flame Retardant Rating 3 UL mm Glow Wire Test IEC mm at 650 C Glow Wire Test IEC mm at 850 C UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass UV FLAM V0 Pass Pass 1 3 seconds 2 Across the flow direction 3 Internal tests show materials to be compliant with UL requirements. Materials are not UL listed 4 UV FLAM is UL approved. File number E249957

8 TYPICAL APPLICATIONS Plug tops Electrical insulation Cords and connectors Railroad applications Cavity wall sockets Gasket profiles

9 FLAMMABILITY TESTING UL94 / IEC The Standard for Flammability of Plastic Materials for Parts in Devices and Appliances, as described by Underwriters Laboratories (UL) is one of the most widely accepted flammability performance standards for plastic materials. This standard determines a materials ability to propagate or extinguish a flame once ignited. VERTICAL TESTING (V0, V1 & V2) The UL 94 Vertical Burn (VB) test is the most common for TPE materials for use in electrical applications. The test includes three classifications - V0, V1 and V2, V0 being the hardest to achieve. This test would be acceptable for portable, unattended, intermittent duty household appliances (such as coffee makers). A test bar is supported at one end in a vertical position. A burner flame is applied to the free end for two ten second intervals, separated by the time it takes for flaming to cease after the first application. See table and diagram on the next page.

10 VERTICAL TESTING (V0, V1 & V2) CLASSIFICATION V0 V1 V2 Maximum flaming combustion for each sample 10 sec 30 sec 30 sec Maximum flaming combustion for all ten samples 50 sec 250 sec 250 sec Cotton below ignited by flamming drips from any sample no no yes Allowable flaming and glowing combustion remaining for 30 sec 60 sec 60 sec

11 GLOW WIRE FLAMMABILITY INDEX IN ACCORDANCE WITH IEC The glow wire test is used to simulate the effect of heat as may arise in malfunctioning electrical equipment. The glow wire is heated via electrical resistance to a specified elevated temperature. A test specimen is held for 30 seconds against the tip of the glow wire with a force of 1 N. After the glow wire is removed, the time for the flames to extinguish is noted along with details of any burning drops. Material that surrounds the test material in application or a layer of tissue paper is placed beneath the specimen during the test to determine the effects of burning drops. Specimen Glow Wire Tissue The material passes the test if one of the following apply: - There is no flame and no glowing. - Flames or glowing of the sample extinguish within 30 seconds after removal of the glow wire, and if the cotton or the paper underlay doesn t ignite or burn.

12 PROCESSING The FLAM grades can easily be processed using conventional thermoplastic equipment for extrusion and injection moulding. The thermoplastic characteristics result in fast processing times and complete scrap recycling. These grades may require pre-drying depending on the specific compound. If poor surface finish, bubbles, voids or streaks are seen on the finished article then material should be dried for 2 to 3 hours at 80 C. Cycle times will be governed by temperature and section thickness. Care must be taken to allow sufficient cooling of the section prior to demoulding in order to prevent permanent distortion of the article. Venting of extrusion lines may be used as a method of preventing the build up of volatiles during continuous processing.under no circumstances should these materials be taken above 230 C as this may cause the flame retardant additive to react which may result in the release of gases or a deterioration the flame retardant properties of the material. This processing information is intended only as a guide. The actual parameters will depend on the machine used and the moulding being produced. Further TPE processing & problem solving information is available to download from our website

13 INJECTION MOULDING Injection Speed: Back Pressure: Back Pressure: Holding Pressure: Cooling: Medium - Fast Medium - Fast Low - Medium Sufficient to pack the mould Can be demoulded when parts have cooled sufficiently Recommended start-up temperatures C

14 EXTRUSION L/D Ration: 20:1-25:1 Compression Ratio: Breaker Plate/Screen: Both should be used Draw Down: 5-10% Cooling: Cold water bath Recommended start-up temperatures C

15 CONTACT US Want to learn more? Contact us at or visit BELGIUM CHINA FRANCE GERMANY t t t t info.be@hexpoltpe.com info.fsc@hexpoltpe.com info.fr@hexpoltpe.com info.de@hexpoltpe.com NORTH AMERICA SWEDEN UK t t t info.na@hexpoltpe.com info.se@hexpoltpe.com info.uk@hexpoltpe.com

16 ABOUT HEXPOL TPE HEXPOL TPE is a global compounding group specialising in Thermoplastic Elastomers (TPE) for key industries such as consumer, medical, packaging, automotive and construction. We have a core belief in being the easiest company to do business with. That s why we invest in our operations, teams and technologies to offer our customers the most reliable, relevant and cost-effective TPE compounds, backed by highly responsive support, technical knowhow and application expertise. Our teams work together, across boundaries, applying the knowledge, experience and talents we have all around the world to meet the needs of our customers LEGACY NAMES: From 2017, the ELASTO and Müller Kunststoffe businesses were renamed to HEXPOL TPE. All the information about chemical and physical properties consists of values measured in tests on injection moulded test specimens. We provide written and illustrated advice in good faith. This should only be regarded as being advisory and does not absolve the customers from doing their own full-scale tests to determine the suitability of the material for the intended applications. You assume all risk and liability arising from your use of the information and/or use or handling of any product. Figures are indicative and can vary depending on the specific grade selected and the production site. HEXPOL TPE makes no representations, guarantees, or warranties of any kind with respect to the information contained in this document about its accuracy, suitability for particular applications, or the results obtained or obtainable using the information. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment. We retain the right to make changes without prior notice. HEXPOL TPE makes no warranties or guarantees, express or implied, respecting suitability of either HEXPOL TPE s products or the information for your process or end-use application. Dryflex is a registered trademark, property of the HEXPOL TPE group of companies. EN_062017

UL 94 Flammability Ratings: Introduction

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